Three-point rear-door lock



March 2', 1926. 1,574,867

H. w. COOLEY THREE-POINT REAR DOOR LOCK Filed Feb. 9. 1924 Patented Mar. 2, 1926.

UNITE stare.

HIRAM WILLIAM COOLEY, OF CHICAGO, ILLINOIS.

THREE-POIINT REAlt-DOOR LOCK.

Application filed February 9, 1924.

To all whom it may concern Be it known that I, HIR M WILLIAM CooLnY, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Three-Point Rear-Door Lock; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to locking mechanism especially adapted for the rear doors of a delivery vehicle.

At the present time closed delivery wagons have a pair of doors upon the rear end for the admission and removal of merchandise and the like. As a general rule these doors are locked by a common latch which simultaneously releases both doors when unlocked. This is frequently undesirable since it will allow articles to escape.

According to this invention a novel form of locking mechanism has been provided for locking these doors, so that when the common latch is unlocked only one of the doors will be released.

The invention comprises the novel structure and combinations hereinafter described and more particularly pointed out -and defined in the appended claims.

On the drawings:

In the accompanying drawings which illustrate a preferred embodiment of this invention and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a fragmentary elevational view of the rear doors of a vehicle.

Figure 2 is a broken sectional view through the rear end of the vehicle taken upon a horizontal plane, showing the locking mechanism in unlocked position.

Figure 3 is an enlarged and broken sectional view taken substantially on line IIIIII of Figure 1, showing parts in elevation.

Figure 1 is a plan view of the locking mechanism for the door as shown in Figure 3.

As shown on the drawings:

Referring to the drawings which illustrate one embodiment of this invention, there .is shown the rear end of a closed vehicle body Serial No. 691,605.

having the usual swinging doors 1 and 2, the former will be termed the first door and the latter the second door according to the order in which they are opened; the door 2 being provided with the overlapping marginal cleat- 3 which serves as an abutment for the door 1. These doors are suitably hinged upon their outer edges and swing outwardly. A spring released latch bar 1 provided with a rotatable locking knob or handle o-attached upon the door 1 is adapted for latching engagement with a catch 6 upon the door 2. As this part of the construction is described fully in my copending application, door latch, Serial No. 676,691, filed November 24, 1923, it is only necessary here to give a brief description of the same. The latch bar 1 is provided with a slot 14 for receiving a hasp 13 formed on the end of the catch bolt 6. The handle 5 is provided at its base with a cam member 12, which is adapted to engage with the hasp 13 when the handle 5 is rotated into the position shown in Figure 3.

The catch 6 constitutes the outer end of a rotatable bolt which extends through the second door. A disk 7 is secured upon the bolt adjacent the inner side of the door. A pair of locking bolts 8 are pivoted at their adjacent ends to the disk 7. These bolt-s extend in vertical direction through suitable keepers 9 upon the inner side of the second door and en age in sockets 10 in the top and bottom of the body. The catch bolt 6'is adapted to be rotated by a handle 11 secured thereupon through the outer side of the door. By rotating the disk 7 through the instrumentality of the handle 11, the bolts 8 may be retracted to unlock the second door or thrown outwardly to lock the door. However, the disk 7 cannot be rotated for retracting the bolts 8 when the doors 1 ,and 2 are in closed position and latched because in that position the hasp 13 is held against rotation in the slot 14. Consequently it will be impossible to unlock the second door before the doors are unlatched by the latch bar et'on account of the engagement of the latch bar 4: with the catch bolt 6. Therefore, it becomes impossible to'open the second door until the first one has been opened. That is, both doors cannot be swung together outwardly when the common latch is released. Nor can the doors be latched until the second door has been independently locked.

I am aware that numerous details of constructions may be varied through a Wide range wlthout departing from the principles of this invention, and I therefore do not purpose limiting the patent granted, otherwise than necessitated by the prior art.

I claim as my invention: I

1. The combination With a pair of swinging doors, of a latch bar hinged upon one door adapted for engaging a rotatable catch bolt upon the other door and prevent rotation thereof a disk secured upon said latch bolt, locking bolts pivoted to said disk and means-for rotating said lat-ch bolt when said latch bar is released.

2. The combination (with a pair of doors constituting a first door and a second door,

of a hinged latch bar upon the first door en-' gageable With a rotatable catch bolt upon the second door, locking bolts for independently locking the second door controlled by the rotation of said catch bolt, said latch bar normally locking said catch bolt against rotation.

3. The combination with a pair of doors of a latch bar hinged to one of said doors, a revoluble catch bolt secured to the second door and cooperatingwith said latch bar to latch the two doors, and independent locl ingineans for said second door controlled by said catch bolt.

In testimony whereof I have hereunto subscribed my name.

HIRAM WILLIAM GOOLEY. 

